气候变化领域集成服务门户(CCPortal): Receiver Function Velocity Analysis Technique and Its Application to Remove Multiples

CCPortal

DOI	10.1029/2020JB019420
	Receiver Function Velocity Analysis Technique and Its Application to Remove Multiples
	Shi J.; Wang T.; Chen L.
发表日期	2020
ISSN	21699313
卷号	125 期号:8
英文摘要	Results of P wave receiver function (RF) analysis (e.g., H-κ stacking, common conversion point (CCP) stacking, and migration) depend on the velocity models employed. Converted phases of crustal and upper mantle discontinuities are often interfered by multiple reflections from shallower structures, adding further complexity to the interpretation of P wave RF images. In this study, we propose a receiver function velocity analysis technique (RFVAT) that can constrain the velocity structure above discontinuities and remove multiple reflections arising from target discontinuities. By scanning the amplitude spectra of the Ps and PpPs phases, we can obtain precise arrival times of these phases for interfaces above 250 km (errors < 0.13 s) and derive the average velocities and thicknesses of the layers between interfaces in the crust and upper mantle. Synthetic experiments are used to demonstrate that crustal and upper mantle discontinuities can be coherently identified and that multiple reflections can be effectively removed in the CCP stacking images of P wave RFs using the RFVAT even with low signal-to-noise ratio data. By applying the proposed RFVAT to real P wave RF data from the northeastern part of the North China Craton, we achieve an improvement in CCP stacking image of lithospheric discontinuities, especially for the lithosphere-asthenosphere boundary (LAB). Our P wave RF images reveal distinct lateral variations of the LAB depth. The lithospheric thickness extends to ~120 km beneath the central orogenic belt and decreases sharply to ~80 km at the west edge of the eastern block, consistent with previous S wave RF studies. ©2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187660
作者单位	School of Earth Sciences and Engineering, Nanjing University, Nanjing, China; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Shi J.,Wang T.,Chen L.. Receiver Function Velocity Analysis Technique and Its Application to Remove Multiples[J],2020,125(8).
APA	Shi J.,Wang T.,&Chen L..(2020).Receiver Function Velocity Analysis Technique and Its Application to Remove Multiples.Journal of Geophysical Research: Solid Earth,125(8).
MLA	Shi J.,et al."Receiver Function Velocity Analysis Technique and Its Application to Remove Multiples".Journal of Geophysical Research: Solid Earth 125.8(2020).